First things first - I would wait and have your driller confirm your PAP and track diameter. Then decide on the ball reaction.
The other question to ask is: what lane conditions are you bowling on? Your driller might also know the answer to that question as well, if he is located in the house that you do most of your bowling at. League shots vs. open play vs. tournament shots are all very different from each other, and dictate different drillings and different approaches to the game (including release/trajectory/ball surface adjustments).
Your goal in drilling the ball will be to try to match the performance of the ball with the ability of the person on a given lane condition to get a desired reaction.
Let us know what your driller says with respect to your PAP, track, and the lane conditions, and then we can talk some more about the layout and reaction you want.
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Dan
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Engineering * Bowling = a fun and practical application of rotational kinematics.
Bowling Nerd Herd (TM) Member